Re: Eprom reading question

[Rubywand <rubywand@swbell.net>]

Ernest writes ...
> 
> I have a no-name clone of an Apple IIe (thanks Wayne,) and I would like to
> figure out who made it. I have a needham eprom programmer, and I was
> wondering if I might be able to figure it out by reading the rom. I know
> that sometimes, developers will add extra info which isn't displayed at
> boot, and that's what I'm hoping in this case. At boot, it just displays
> "IIe."
> 

     You could go into the monitor-- from the usual Applesoft prompt type in
CALL -151 (and press Return).  Then, to display a block of stuff in, say, the
$F8xx ROM, you could enter

F800.F87F

Or, to get a disassembled interpretation of the contents, you could enter

F800L

and enter further "L"'s to continue the listing.



> I have several disks full of ROM images, like "B 010 ACE 1000 - F8." This is
> a binary file, right? What's a good program to use to open this "B" file
> type to see what's in the ROM?
>

     If these are binary files you could BLOAD them into some place in memory
and look at the contents by going to the monitor as described above. For
instance, after booting DOS 3.3, you could BLOAD the file mentioned into memory
at $1000:

BLOAD ACE 1000 - F8, A$1000

Then, CALL -151 to get into the monitor. Then ...

1000L

to begin looking at a disassembled listing.